Sewage cutting device



Dec. 15, 1,942. s u-rucc 2,305,109

SEWAGE CUTTING DEVICE Filed Feb. 14, 1942. 2 Sheets-Sheet l I g wjgwg mwwt Dec. 15,- 1942. N. SANTUCCI 2,305,109

' SEWAGE CUTTING DEVICE Filed Feb. 14, 1942 v 2 Sheets-Sheet 2 15 J Z7 3 15 19 a5 22 15 Z5 Z8 Z0, Z1 4 9' INVENTOR.

Patented Dec. 15, 1942 a UNlTED' STATES rorrics 2,305,109 SEWAGECUTTING DEVICE Nicholassantucci, Niles Center, Ill. Application February 14, 1042, Serial No. 430,882

Claims.

The present invention relates to sewage cutting devices and is particularly adaptedfor use in connection with the influent ofsewage before treatment in a sewage'disposal plant. I

Before sewage can be satisfactorily treated, particularly if it is to be passed throughpumps or other similar devices, it is necessary that it be cut into relatively small pieces. Sewage cut into small pieces readily passes through pipes and other mechanical devices employed in sewage treatment equipment. Furthermore, in most sewage disposal systems, small pieces are more easily and effectively treated thanlarge pieces.

The primary object of the present invention is the provision of a sewage cutting device that is small in size which is simple in operation, easily repaired and readily installed.

Another object of the invention is the provision of such a device in which the cutting action results from reciprocal movement.

A still further object of the invention is the provision of a, device which is self-cleaning.

Still another object of theinvention is the provision of a device incorporating simple and effective driving means for reciprocating the cutting members.

Other objects and advantagesv of the invention will be obvious to those skilled in the art upon understanding the preferred embodiment thereof described in the accompanying drawings and hereinafter described. It is to be understood that the structure shown in the drawings and the details set forth in the description of the drawings is not to be construed as unduly limiting the scope of the invention as defined in the appending claims, for it is apparent that changes in the design and construction of the apparatus may be made without departing from the true spirit and scope of the invention.

Referring to the drawings,

Fig. 1 is a view partially in elevation and partially in section showing my improved device and a channel wherein the same is mounted.

Fig. 2 is a sectional view taken through the center of the structure shown in Fig. l.

Fig. 3 is a cross-sectional view taken on the lines 3-3 of Fig. 2 and Fig. 4 is a detailed view in elevation of the cam mechanism for operating the cutting knives.

The device comprises an outer casing l0 which is generally cylindrical in shape and provided with a plurality of elongated slot shaped openings ll. Mounted on the cylindrical body portion H) are three spaced annular cutting knives, l2, I3 and I4, respectively. The cutting knives l2, l3

and M are preferably recessed in the-body portion iii. if desired the cutting knives may be formed in sections and fastened to the body portion by any suitable means so that they may be conveniently removed for-sharpening or replacement. At the bottom of the body portion ill is a base member I 5 which is fastened'in the channel of the sewer.

-The body portion it being cylindrical the sewer channel may be shaped with an enlarged portion B which surrounds the body portion so' that the eflluent may pass through the body portion l0 and through the bottom of the device into the exit side of the channel Q. Mounted within the body portion is a reciprocating frame member ll provided With cross members it and till-at the upper portion thereof and similar cross members 20 and El at the bottom thereof) as shown in Figs. 2 and 3. The reciprocating frame ll is suitably braced by bracing members indicated by the reference character'2'2; At'the top and bottom of the reciprocating frame ll are provided annular members 23. and. 24, respectively,

which are secured to the cross members. .Pro

jecting from the top annular member 23 are a plurality of fingers 25 which extend into the slots ll- Similar fingers 26 project from the bottom annular member 24 into the slots H.

An annular cutting knife 21 is secured. to all or a portion. of the fingers 25 on the outside of the body portion l0 and an annular cutting knife 28 is likewise secured to the fingers 28. The cutting knives 21 and 28 project beyond the fingers so that the cutting knives enter into cutting engagement with the cutting knives: l2, l3 and I4. I

A. top member 23 is secured to thebody portion Ill. The top member is provided'with a plurality of openings 30 through which efiluent may flow in the event of high water conditions in the sewer which sometimes occur after heavy rains. Mounted in the center of the top member 29 is a bearing member 3| through which bearing member passes the shaft 32 which is fixedly secured to theframe 31.

Coaxially with and projecting upwardly from the shaft 32 is a cam member 33 shown in detail in Fig. 4.. The cam member 33 may be secured to the shaft 32 by screw threading the same into engagement therewith as shown in the drawings, or any other convenient attaching means may be employed. It is even possible to make the cam member integral with the shaft 32, but for convenience in assembling, adjustment and repairing it is desirable to have the cam member 33 detachable from the shaft 32.

Surrounding the cam member 33 is a hollow sleeve 34 provided with a projection 35 which rides in the cam shaped slot 36 provided in the cam member 33. Projecting upwardly and coaxially with the sleeve 34 is a shaft 31 which is rotatably mounted in a bearing member 33. The bearing member 38 may be suitably mounted so that it will be held in fixed position. Attached to the upper end of the shaft 31 is a coupling member 39 which is of conventional form, being providedwith the usual spacer and shock absorbing means 40.

A shaft 4| is provided at the top side of the coupling 39, which shaft is connected with the source of power (not shown) which is 'prefer-' ably an electric motor. 7

In the operation of the device, rotation of the shaft 4| by any suitable means of power rotates the sleeve 34. The lug 35 being fixedly secured to the sleeve 34 and in engagement with the cam member 33 causes the cam to reciprocate as the sleeve 34 rotates. The cam member being attached to the shaft 32 whichis in turn secured to the frame II, the frame II will likewise reciprocate. The cam groove 36 is preferably shaped so as to cause the knife 21 to pass into cutting engagement with the knife l2 as well as into cutting engagement with the knife l3 and the knives are so spaced that cutting engagement will be had between the knives 28 which reciprocate and the fixed knives l3 and I4. By this arrangement which mploys a slot cam it will be apparent that the movable cutting knives are forced both up and down so that the device cuts both at the bottom and at the top of the stroke.

The fingers 25 and 2B projecting into the slots ll clear the slots of debris and cause the device to be self-cleaning. The knives l2 and I3 being recessed in the body portion ID, the only material which can enter into cutting engagement with the knives is material such as will wholly or partially pass into the slots H. Thus there is little likelihood of pieces of material so large engaging the knives as to cause damage to the machine. Since the moving knives 21 and 28 reciprocate the cutting action is very effective and the slot 36 and the cam 33 may be so shaped as to secure the maximum pressure on the cutting knives when they are about to make cutting engagement.

I claim:

1. In a device of the class described a cylindrical body portion having elongated slots therein, a fixed knife member peripherally mountedon said body portion, a movable annular knife member for cutting engagement with said fixed knife member and reciprocating means passing through the slots in said casing and providing a mounting means for said movable knife meniber.

2. In a device of the class described a hollow cylindrical body portion having axially aligned slots therein, a fixed knife member peripherally mounted on said body portion, a movable annular knife member for cutting engagement with said fixed knife member, reciprocating means passing through said slots and providing a mounting means for said movable knife member and means for actuating said reciprocating means comprising a slotted cam operably associated with said reciprocating means and means for driving said slotted cam.

3. In a device of the class described a hollow cylindrical body portion having elongated axially aligned slots therein, spaced knife members mounted on the exterior of said body portion, a reciprocating member mounted within said cylindrical body portion, means secured to said reciprocating member and projecting into said slots between said fixed knife members, an annular knife member mounted on said members projecting into said slots and means for driving said reciprocating member to cause said knife member to alternately come into cutting engagement with two of said fixed knife members.

4. In a device of the class described a hollow cylindrical body portion having elongated axially aligned slots therein, spaced knife members mounted on the exterior of said body portion, a reciprocating member mounted within said cylindrical body portion, means secured to said rediprocating member and projecting into said slots between said fixed knife members, an annular knife member mounted on said members projecting into said slots and means for driving said reciprocating member to cause said knife member to alternately come into cutting engagement with said fixed knife members, said driving means including a slotted cam secured to said reciprocating member and a rotating member having a finger in engagement with said slotted cam.

5.'In a device of the class described a cylindrical body portion having elongated axially aligned slots therein, fixed knife members recessed in the outer periphery of said cylindrical body portion, a reciprocating member positioned inside of said body portion and having fingers projecting through said slots, a movable knife member surrounding said body portion. and fixedly secured to a plurality of said fingers and means for reciprocating said reciprocating member to cause said movable knife member to enter into cutting engagement with said fixed knife members, the bottom of said casing having an exit port and a cover for the top of said casing said cover having overflow openings therein.

NICHOLAS SANTUCCI. 

